【語法】連詞when-完整版課件

連詞whenLead-inicesteamfreezesmeltsboilscoolsdownwaterLead-inWhenwaterboils,itturnsintosteam.Whenwaterfreezes,itturnsintoice.Whenicemelts,itturnsintowater.Whensteamcoolsdown,itturnsintowater.Presentation1.Whathappenswhenwaterboils?2.Whathappenswhenwaterfreezes?

Whenwaterboils,itturnsintosteam.Whenwaterfreezes,itturnsintoice.Presentation3.Whathappenswhenwatericemelts?4.Whathappenswhenwatersteamcoolsdown?

Whenicemelts,itturnsintowater.Whensteamcoolsdown,itturnsintowater.Presentation5.Putadrylidonaglassofhotwater.Waterfortenseconds.Takethelidoff.Whatisunderthelid?

6.Howdoesithappen?

Thewaterisunderthelid.Whensteamcoolsdown,itturnsintowater.Presentation7.Someicecubesinaglassofwater.Waitfortwominutes.Lookattheoutsideoftheglass.Whatisontheglass?

8.Howdoesithappen?

Whenicemelts,itturnsintowater.Thereissomewaterontheglass.Presentation4.IstudyEnglishandChinese.1.Whendoyougotoschool?2.Whenicemelts,itturnsintowater.3.Itturnsintowaterwhensteamcoolsdown.仔細(xì)觀察你能發(fā)現(xiàn)什么5.Idon’tlikemathsorEnglish.疑問代詞連詞Presentationwhen連詞,表示“當(dāng)……的時(shí)候”。從句中既可用延續(xù)性動(dòng)詞，又可用非延續(xù)性動(dòng)詞，這些動(dòng)詞既可以表示動(dòng)作，又可表示狀態(tài)。從句中的動(dòng)作既可和主句的動(dòng)作同時(shí)發(fā)生，又可在主句的動(dòng)作之前或之后發(fā)生。

連詞：是虛詞，把詞與詞，短語與短語，句子與句子連接起來，他不能在句中單獨(dú)作句子成分。Presentation1.WhenIcameintotheroom,Ifoundhimlyingthereasleep.2.Whenthetwomenwereleaving,amessagearrived.3.Whenicemelts,itturnsintowater.PresentationTheweatherwasfinewhilewewereinBeijing.While表示"在……的時(shí)候"、"在……期間"。它強(qiáng)調(diào)主句的動(dòng)作與從句的動(dòng)作同時(shí)發(fā)生或主句的動(dòng)作發(fā)生在從句的動(dòng)作過程中。

Whilewewereswimmingsomeonestoleourclothes.

如果主句的動(dòng)作在從句的動(dòng)作過程中發(fā)生，從句常用進(jìn)行時(shí)。

Presentationwhen,while總結(jié)

1.When可指時(shí)間點(diǎn)，又可指時(shí)間段，從句中可用延續(xù)性動(dòng)詞，也可用非延續(xù)性動(dòng)詞。若主句與從句所表示的動(dòng)作不是同時(shí)發(fā)生，有先后順序時(shí)，要用when。Presentationwhen,while總結(jié)2.While總是指一個(gè)時(shí)間段，從句中必須用延續(xù)性動(dòng)詞。3.表示主句的動(dòng)作發(fā)生在從句的較長(zhǎng)動(dòng)作過程中，when,while,均可使用。從句中為be動(dòng)詞時(shí)，多用when和while。談?wù)搩蓚€(gè)同時(shí)進(jìn)行的長(zhǎng)動(dòng)作可用while。Practice2.Wewerehavinglunch

someoneknockedatthedoor.A．a(chǎn)s B．a(chǎn)soonas C．when D．while1.－I′mgoingtothepostoffice.

－_____youarethere,canyoubuymesomestamps?A．As

B．while

C．Because

D．IfBC隨堂練習(xí)Practice3.______youmeetawordyoudon'tknow,consultthedictionary.4.Shecalled_______Iwasout.5.________youhavefinishedyourwork,youmayhavearest.6.Iwasjustreadingabook______shecameintomyroom.whilewhenwhenwhen隨堂練習(xí)Practice(1)

hewasreading,hefellasleep.(2)

hecamein,Iwashavinglunch.(3)

Iwassleeping,athiefbrokein.(4)

theweatherisgood,Iusuallygotothecountry.WhileWhenWhenWhen隨堂練習(xí)PracticeWhenIwaswaitingforabus,Imether.()WhileIwaswaitingforabus,Imether.()WhileIgothome,hewascooking.()Whenhewascooking,Igothome.()WhileIheardthebadnewsIfeltsad.()WhenIheardthebadnews,Ifeltsad.()√××××√隨堂練習(xí)Practice【2012.浙江紹興】

1.Motherwascooking

she

aknockatthedoor.Awhen,listentoBwhile,listentoCwhile,heardDwhen,heard[答案]D．[解析]when的意思是就在那時(shí)，那一刻cooking持續(xù)性動(dòng)詞，heard聽見，listento聽，因此選D。直擊中考DPractice【2012.上?！?/p>

2.Johnfellasleep

hewaslisteningtothemusic.Aafter